chore(css): Update group of CSS Cascading and Inheritance

Author: skyclouds2001

css/at-rules.json

@@ -329,6 +329,7 @@
   "@import": {
     "syntax": "@import [ <string> | <url> ]\n        [ layer | layer(<layer-name>) ]?\n        [ supports( [ <supports-condition> | <declaration> ] ) ]?\n        <media-query-list>? ;",
     "groups": [
+      "CSS Cascading and Inheritance",
       "CSS Conditional Rules",
       "Media Queries"
     ],

css/properties.json

@@ -1724,7 +1724,7 @@
     "animationType": "eachOfShorthandPropertiesExceptUnicodeBiDiAndDirection",
     "percentages": "no",
     "groups": [
-      "CSS Miscellaneous"
+      "CSS Cascading and Inheritance"
     ],
     "initial": "noPracticalInitialValue",
     "appliesto": "allElements",